Lubricant compressor



July 6', 1.926,.'

E w DAVIS LUBRICANT coMPREssoR Filed April 19, v1924 Patented July 6, .1926.

umso s'rA-T'Es ERNEST w. nAvIs, or den PARK, ILLINoLI's,y AssIGNon To THE PAssIcx vIMNUFA-c:-A

TUnINe COMPANY, oP-cHIcAso, ILLINOIS, A CORPORATION or PELAWAR.

LUBRICANT co'MPnEsson;

Application mednprii 1 9, 1924. semi Nt. 797,708.

My invention relates to improvements in .lubricant compressors, and is particularly.

concernedfwith the 'provision of -a novel type of'lubricator to be used asa part of '5 a lubricating system,co1nprisin a plurality of fittings adapted to be secure to the various bearings of the mechanism to be 1ubri cated, and a compressor comprising means for successively making`sealed connection with the fittings, lsaid other means for forcing .lubricant into pressure.

vOne ofthe objects of my pressent invention is to provide a compressor of the character described'which is particularly adapt-` ed to be used for forcing the heavy, plastic the fittings under high lubricant which is used forlubricating thev crank lpins and other similar bearings of yrailway locomotives. This lubricant is y of f 2.0* about the same consistency as hard laundry soap, and requires an excessively high pressure to force it into the bearings where it .is used.

Another object of my invention is to provide a compressor of the character described,

Vembodying .a low pressure cylinder, chamber, or barrel for holding a supply of lubricant, and a high pressure lcylinder co1n- "municating therewith, in combination with 0 means for forcing the lubricant from the 4high pressure cylinder into a bearing to be 'videa compressor for. lubricant comprising' a low pressure barrel `and a vhigh pressure cylinder, and means actuated by the-movement of a handle in vone direction for primfV `ing or filling the high pressure cylinder from the low pressure cylinder, and .actuated by the movement of the handle in theopposite direction to discharge the lubricant from the high pressure cylinder. A 'still fuv her object is to provide a compressor of the character described which is simple Lin construction, economicalto manufacture, and easy to operate.

' Other objects of my invention will appear from time .to time' as this description procompressor comprises the screw 2() which panyingdjrawings., in which;

.. Figure lis a central longitudinal section through my improved compressor, and

' Figure 2 is a perspective view of one of the elements thereof.

`Referring to the drawing?, a

the removable closure 6, whichis secured to the lbarrel by means of a screw threaded- .connection 7 ,j or in any. othersuitable manner. AA piston rod `8 is threaded through the closure 6 land provided lat its outer end with a suitable handle or handwheel 9, by which'it can be rotated.1 A plunger, comprisin the follower plate 10, the cup leather or gas ret 1.1, and the face plate 12, is rigidly secured to the inner end of the piston rod 8 and'is prevented fromrotating thereon by the key 13, or in any other suitable manner.

my' improved i rrel 5 having .gresses, reference being had yto the accom- The end of the barrel opposite the closure 6 is provided with a secondclosure 14 which comprises the tubular extension 15, the bore of which,`atthe outer end thereof, is reduced in diameter and provided with the internal threadsl. I prefer to make the threads on thev piston rod 8, and the corresponding threads on the closure 6, right handed threads, 'and the threads16 left `handed threads.

The'tubular extension 15 forms a, high pressure c linder-for receiving theinner end ofthe hol ow plunger 17, which is provided i with theexternal'threads 18 for coactingV with theinternal threads 16 of the high pressure cylinder '15. Preferably the threads 16 and 18 are double threads and, 'as' stated above, extend in a direction opposite to the' threads of thepiston rodv8. The inner end of' the. hollow plunger 17 is provided with an enlargement 19 which is here shown as being formed separately from the plunger i 17 and threaded thereon. This enlarge' ment is locked in lace by means of the set orms a key between the threaded portion ofthe plunger and the enlargement 19.

' To prevent vany jamming'of the ,threads 16 and 18 when the hollow plunger 17 is in its-outermost position, I provide the shoul- Ider 21 on the enlargement or collar 19, which is. adapted to engage the pin 22 which extends through the wall of the tubular extension or high shown in Figure pressure cylinder 15, as l The means which I have herein illustrated for establishing sealed connection between a fitting 23 secured to a bearing 24 and the compressor just described comprises the body member`25, having the tubular eX-y tension 26. which' receives the outer end of the hollow plungerv17, and vwhich isvsecured thereto by means of the pin 27. The body member 25'is provided with a transversely extending bore '28, one end of which is flanged over, .as shown at 29, and the other 4end of which is closed by the screw threaded plug 30. A gasket 31 and a cup -leather 32,

Y which are yieldingly held against the flange 29 by means of the compression spring 33, provide means for establishing sealed contact with the head 23 of the fitting, and for 'preventing the escape of lubricant between the gasket 31 and the walls of the bore 128. A pair of flanges 34, formed integrally with the body member 25 and engaging beneath the head 23 of the fitting. provide means for mechanically securing the body member to the fitting.

The coupling member liust described is described in more detail andclaimed in the co7 pending application of Clayton L. Sonen, Serial'No. 707,713, vfiled April 19, 1924.

It should, however, be Athoroughly vunderstood that the type of coupling illustrated and described herein is not essential to the proper operation of my improved compressor, and that'any suitable type of coupling member,.which is constructed to make sealed connection'with a fitting and lto provide an anchorage for the hollow plunger 17, may be employed. I

In the operation of my improved compressor, after the coupling member just de# 'scribed is connected with a fitting 23, as

shown in Figure l, theoperator turns the handle or'hand wheel 9 in a clockwise direction, thereby effecting two different results; l first, the high pressure cylinder or tubular extension -15 is moved in a direction away from the fitting 23 until the shoulder 21 contacts with the pin 22. This positions thei enlargement 19 of the hollow plunger 17 at the outer end of the high pressure cylinder 15. Second, the plunger carried -by the` inner end of the piston rod 8 is advanced toward the high pressure cylinder, thereby forcing lubricant from the barrel 5 into-the high pressure cylinder. These two operations may take place simultaneously, or one after the other, but in any event both functions will be produced'. The operator continuesto turn upon the handle 9 until the resistance to its turning movement increases to the point where it is no longer possible easily .to turnthe handle 9. l

When this occurs, the lubricant in the barrel 5 and in the high pressure cylinder is under considerable pressure, and the flange 11" of the cup leather 11 is held in frictional contact with the wall of the barrel 5 by the pressure of the lubricant. kThe operator thereupon turns the handle 9 in the'opposite direction. This movement of the handle 9 'is communicated through the piston rod 8 and the frictional contact between the flange 11 and the barrel 5 to the high'pressure -By repeating .the operation described above, thatis, first. turning the handle 9 in a clockwise direction, and then turning it in a counterclockwise direction, lthe operator' canl force successive charges of lubricant from the high pressure cylinder into the fitting until sufficient lubricant has been Supplied-to the bearing with which the compresser is connected. By then rotating the handle 9 through a small arc in a clockwise direction, the operator can relieve the prest sure on the lubricant in the barrel 5, thereby permitting the coupling' member to be detached "from l the fitting 23 and connected with the next fitting 23.

While I havedescfibed the deelne of @0nstruction of the preferred embodiment of.

my invention, it is to be clearly understood that my invention is not limited to these details, butis capable of other adaptations and modifications' within the scope-of thev appended claims. Y'

Having thus descrlbedg-my invention, what l I claim is: l. A lubricant compressor comprising a barrel having a removable closure at one end., a piston rod threaded through said closure, a piston rigidly secured to the inner end of said piston rod, said piston comprising a 'cup leather, the flange of which contacts with said barrel, a` closure for the opposite end of said barrel, said last. named closure having'atubular extension forming a high pressure cylinder communicating with said barrel and coaxial therewith, the outer end of said vhigh pressure cylinder having Vinternal threads extending in a directionop'posite to' those of said piston rod,

a hollow plunger threaded into said tu bularextension, the inner enld of said plunger being reciproable in said high pressure cylinder, and a coupling member carried by the outer end of said plunger.

2. A lubricant compressor comprising a barrel having a closure at one end, a piston rod threaded through said closure, a piston rigidly secured to the inner end of said piston rod, said piston comprising a cu leather, the fiange'of whichl contacts wit said barrel, a high pressurev cylinder com- 'l municating Vwith saidbarrel and coaxial therewith, the vouter end of said high pres-` sure cylinder having internal threads eX-' tending'in a direction opposite 'to those of said piston rod, a hollow plunger threaded into said tubular extension, the inner end of said plunger being reciprocable in said hlgh 4pressure cylinder, and a coupling member carried by the outer end .of said plunger.

3. A lubricant compressor comprising a barrel having a closure, a piston rod threaded through said closure, a piston rigidly s ecured to the inner end of said piston rod, said piston comprising arrexpansible member for Contact wit said barrel, a pressure cylinder communicating with said barrel, the

outer end. of said high pressure cylinder v having internalthreads extendingin a d1' rection opposite to those of said piston rod, ahollow plunger threaded into saldtubular extension, .a portion of said plungerb eing. reciprocable insaid high pressure c lainder, and a coupling member carried y.

.the outer end ofsaid plunger.

' 4. A. lubricant'v compressor com rising a barrel,\ a piston reciprocable in sald barrel, said piston .comprising a portion expansible int' eontactI with said barrel, a threaded piston rodv rigidlyconnected with said piston, a" high pressure cylinder communicating with said barrel, a hollow.r plunger reciprocable in said high pressure -cylinder 1 /and having a threaded connection with said high pressure cylinder, the threads ogsaid j plunger extending in a; direction opposite to the threads of 'said piston rod, and va coupling `m`e`rnbervrgidly secured' 4to v`said 15. A lubricant compressor comprlsnig a barrel, a piston reciprocable in said barrel, a threaded pistonrod rigidly connected -with saidpiston, a high pressure cylinder 'communicating withl said barrel a hollow plunger reciprocable in said high cant in said barrel under `increased pressure.

:said container under pressure, rotary means pressure cylinder and'having athreaded connection 46 with a portion of said compressor ri idly vconnected with'. said barrel, the threa s of. said plunger extending in a direction opposite to the threads of saidpiston rod, and aI-coupling' memberv secured to said4 plunger. 6. A lubricant compressor comprising a barrel, a highpressure cylindercommu-y nicating'with said barrel, a couplingmember, communicating, with said barrel, a handle, means actuated by the rotation of said M handle -in one direction, for placing the lu- 'bricant in said barrel under low pressure,

actuated by the rotation ofsaid handlein the opposite direction, for placing the lubri- 8 A lubricant compressor comprising a container, `rotary means driven by a twist in onev direction for placing the contents of said container under pressure, and rotary means driven by a twist in the other direction for placing said contents under increased ressure.

9. A lu ricant compressor comprising a container, rotary means driven by aftwist in one direction for placing the contents of driven by a twist-inthe other direction'for placing said contents under increased pres-- sure, and a single "drive element for actuating bah-.rotary means. f i In-fwitness l whereof, Lghereunto` subscribe my name thth da vofY ril 1924. if 1* e ER EsrfbAvIs. 

